Leveling scraper



Oct. 29, A 'G GURRIES LEVELING scRAPER Filed July 30, 1938 A. G. GLu rzes BY Q.... fibm ATTO R N EY Patented Oct. 29, 1940 PATENTQOFFICE LEVELING semen Albert G. Gurries, Gilroy,.

Calit, assignor to Be-Ge Manufacturing and Welding Works,

Gilroy, said Albert Calif a co-partnership composed of G. Gurries and James A. Busse Application July so, 1938, Serial No. 222,214

2 Claims. (01. 37-126) This invention relates to leveling scrapers, in

which the dirt, after being is at once re-deposited on the ground,

tinguished from dirt may be transported a considerable distance scraped into the bowl,

as discarrying scrapers, in which the before being discharged.

. After the bowl of a filled, or partially so, scraped up by the blade scraper rolls up i ahead of the same, as ordinarily constructed,

any further dirt which is with the advance ofthe n front of the blade, and remains and in scrapers of this type such dirt may be pushed along on the ground as the scraper advances to the point of desired leveling or dumpins. This dirt resistance and movement sets up considerable necessitates a relatively great expenditure of power to operate the scraper.

It is therefore the principal. object of my' in-.

vention tolessen this objectionable resistance by providing a form of front apron for scrapers of the leveling type, so arranged as to relieve this resisting pressure at the cutting edge of the blade as well as on the ground.

interference with the desired freedom of leveling or dumping of the entire load is had.

A further object of the invention is to increase the load carrying capacity of the scraper without increasing its size, by the provision of means in addition to the apron to prevent lateral spillage of dirt around the bowl from in front as the scraper advances and becomes loaded.

A further object of the invention is to produce a simple and inexpensive exceedingly efiective for the purpose for which it is designed.

which will be These objects device and yet one I accomplish by means of such structure and relative arrangement of parts as willfully appear by a perusal of the following specification and claims.

In the drawing similar characters of reference indicate corresponding parts in the several views:

Figure l is a sectional elevation of my improved leveling scraper.

Figure 2 is a fragmentary same.

Figure 3 is a on the line 3--3 side elevation of the fragmentary cross section taken of Figure 2, and looking forward.

Referring now more particularly to the characters of reference on the drawing,

the scraper com 'the frame of beams l-supported by At their forward end prises side end.

the beams are connected by a transverse beam 3, which supports spaced upstanding plates 4. Relatively short bea verging relation ms 5 extend forwardly in confrcm the top of the plates 4, and

leveling scraper has been end are pivoted on the beams At the same time, no I lowered, correspondingly raising scraping blade of the bowl. With this movement mounted.

Disposed between the side beams I, intermediate the rear wheels 2 and the cross beam 3 is 5 the scraper bowl which includes a back and bottom plate terminating in a scraping blade 9 and side plates [0 projecting somewhat'ahead of the blade. A pair of straps ll converging to their upper end, project upwardly from' each side 10 plate, these pairs of straps being connected at the top by. a cross shaft l2. This shaft at its ends serves as a connecting means for the piston rods of hydraulic cylinders 13, which at their lower I, as indicated at M. 15

A short distance above the blade, tension arms l5 are pivoted at their rear end on the side plates on the inside thereof, which arms at their forward end are secured on a transverse shaft |6 turnably mounted on the frame adjacent and back of the cross beam 3. An upstanding arm unit I! is secured on the shaft l6 centrally of its ends, which is connected by a forwardly extending linkage ill to the piston rod of a hydraulic cylinder l9, swivelly supported from the beams 5 on top of the same. It will thus be seen that by movement of the piston rod in onedirection or the other, the arms IE will be raised or or lowering the of the blade, the hydraulic cylinders l3 swing about the pivots l4 somewhat.

It is sometimes desired to hold the bowl raisedv clear of the ground a pre-determined distance without relying on the fluid pressure in the cylinder 59, as when transporting theunloaded scraper from one point to another. I therefore provide a pair of straps 20 which are supported in fixed relation between the plates 4, and which project on opposite sides of the arm unit ll. These straps at their rear end are provided with alined pin receiving holes 2|, which are disposed just back of the rear edge of said arm unit when the latter is in a forward position and the scraper bowl is raised well clear of the ground, as indicated in dotted lines in Fig. l.

Secured rigid with the shaft I6 and arms l5 and extending the full distancebetween the latter from on top of the shaft is an apron plate 22, disposed with a downward'slant relative to 50 said arms. The length of this plate is such that it clears the ground a certain distance when the blade is in scraping position, as shown in Fig.

1, and the rear end of said apron is then disposed in front of and above the blade. 5

The apron therefore forms a dirt supporting shelf onto which a considerable amount of dirt falls as such dirt becomes banked up and pushed ahead by the forward movement of the scraper, and-which would otherwise be all retained on the ground'where it wouldoffer great resistance to said movement. Also the downward pressure of the dirt on -the scraping blade, and which acts in opposition to the pressure of the incoming dirt as it rides up on the blade is con'-' 55 with the side plates, and the width of the.

gap between the blade and apron is increased.

In order to prevent escape of dirt laterally between the apron and side plates of the bowl, skirt plates 23 are secured on and depend from the arms l5, which plates extend from the rear end of the apron to the rear end of said arms in close overlapping relation to the side plates of the bowl. Additional protection against loss of dirt laterally is afiorded by means of longitudinal skirt plates 24 rigid with and depending from the inner edges of the beams l, as close to the side plates ill as possible. These plates 25 extend from the back edge of the cross beam 3 some distance rearwardly of the forward edge of the sideplates ill. tension skirt plates 25 overlap and are secured against the plates 24, so that side closures ex--' tending to adjacent the ground level from a point at least overlapping the scraping blade may be formed as desired;

From the foregoing description it will be readily seen that I have produced such a device. as substantially fulfills the objects of the invention as set forth herein.

This is beacuse Vertically adjustable ex-' While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from'the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is: v

1. A leveling scraper comprising a wheel supported frame having side beams, a bowl tiltably hung between the beams and including side plates and a scraping blade adjacent the forskirt plates depending from the arms and ex- )tending rearwardly from the apron to adjacent the rear end of the arms in overlapping relation to the side plates of the bowl.

2. A scraper comprising a frame which includes side beams, a bowl tiltably hung between the beams and having a scraping blade at its forward end, tension arms pivoted at their forward end on the frame ahead of the bowl and at their rear end on the bowl adjacent its forward end, means to turn the arms about their frame pivot, an apron plate rigid with and extending rearwardly and downwardly between the arms at an acute angle to a horizontal plane to a termination above and ahead of the blade but below the-top of the bowl and skirt plates rigid with and depending from the arms and extending rearwardly from the apron plate to adjacent the rear end of the arms at a level near the blade in overlapping relation to the sides of the bowl.

, ALBERT G. QUERIES. 

